Soot blower for boilers



Oct, 20, L. J. BAYER SCOT BLOWER FOR BOILERS 2 Sheets-Sheet I Filed Nov. 13. 1922 4- v. I VATTQRNEYM f Oct. 20, 1925- L. J. BAYER soo'r aLown Fon aomzns mea Nov. 13. 1922 2 .mm-snm a ig'.

A Tromv Y Patented Oct. 20, 1925.

UNITED4 STATES LEO-JOHN BAYER, or sT. Louis, Miss'otrm..

"soon: BLOWER. Fon normas.

Application led November 13, 1922. *Serial* No. 600,610.

To a-ZZ whom t may concern:

Be it known that I, Lno JOHN BAYER, a citizen of the United States, residing at St. Louis, State of Missouri, have invented cere l tain new and useful Improvements in Soot Blowers for Boilers, ofk which the following is a specification.

My invention has relation to improvements in soot blowers, or boiler cleaners,

particularly applicablegto water-tube boilers.

The principal object sought by the present improvements, is to provide a soot blower unit capable ofv withstanding the highest boiler temperatures for a long period of time wit-hout becoming unserviceable. v

It is well known that in order to successfully remove the soot from the tubes and baiiies of water-tube. boilers, the various blower units that comprise a boiler cleaner must be distributed about the boiler from one end of the line of draft to the other. Now, toward the front of the line of draft the temperature of the gases is so high that a blower unit herelocated is soon rendered unfit for service.A However, these forward blower units cannot be dispensed with, Yso the problem is, howto construct themV to withstand this great heat. In my co-pending application, Serial No. 559,290, tiled May 8, 1922, I show a blower unit compris ing a blower pipe surrounded by ajacket through which air circulates `about the blower pipe, the jacket being made in sections to overcome warping, as explained in said application. However, I-have found that in some boilers the temperature runs so very high thatthe air circulation in the jacket is insufficient to hold down the tem perature of theblower unit below that at which it becomes distorted. -It is the object of the present.r inventionV to so cnstruct'the blower pipe that notwithstanding it ymaybe subjected to considerable heat itl will not become distorted, but will remain cof1nparatively .straightw` and serviceable for long periods. i Y s l i l 4 Further apivantages will be better apparent from detailed description of the invention in connection with the accompany-L ing drawings, in.whichl i Figure l is a combined side elevation and section of the front end of my improved blowerunit, applied to a boiler, )arts being broken away;.Fig. 2 is side elevation of the opposite end of said blower unit,the side wall of the boiler setting and tubes being' in section; Fig. 3 n j tudinal section through apart of the/blower unit,'showing the sectional jacket and sec tional blower pipe comprisingsaid unit; Fig. l is an enlarged section of apart of the blower pipe showing the ends of two tubular sections connect-ed by a flexible element; Fig. 5 is a. cross-section through the blower pipe and jacket taken on the line 5#5 of Fig. 2; Figures 6 to 11 inclusive are longitudinal sections of l.modiiied forms of blower pipegfFig. 12 is a sideelevation or a piecel of iiexible tubing that under certain conditions might l satisfactorilyy be used for the blower pipe. j v j Referring tothe drawings, and for the present to Figures l to 5 inclusive, A representsV my improved blower` unit supported by brackets 1- from the boiler' tubes T, the head H of said'funit being supported by a. bracket 2 from the boiler' wall IV. The construction of the head H is the same/as that shown in my co-pendingapplicationv above referred to, and will not be specifically described'herein. The unitA is rotated by a 'gear wheel 3, pinion .y Land pulley 5,` and is provided with steam fromia supply vpipe 6 vcontrolled by a, valve Tas, in said applica ti011- l l v` l They-'blower unit AY comprises ablower is a middle'longi-y pipe B and jacket J surrounding an-d spaced from the blower pipe, so that airv may enter the jacket throughfan inlet opening 4o and 'after circulating through the acket around the' blower 'pi-pelinay discharge into' Vthe boiler iue- (not shown); In'1orde'r that the .intense heat to which the ,jacket is subjected may not warp' and distortfthejacket out of line, ,said jacket is' composed of aserie's'of sections 8, each section beingconnectedtby a sliding fit) to the adjacent section byan internal sleeve 9, aslight clearance X being provided between the sections 8 to permit of expansion under heat (Figures 2 and 3). By virtue of' this construction' expansion and contraction of the jacket isy compensated for and buckling and warping of the unitdoes tion with the blower lpipe B by'radiallyv disposed studs 10 screw-threaded through the sections 8 into sliding contact with the` blower pipe B., the'studs in any one placebeing 9(2)" apart and distributed in alinement and equally spaced along the jacket. Opposite to one row lof studs are the nozzles 11 adapted to discharge steam into the bank of tubes T, each nozzle being screw-threaded into the blower pipe B and having an intermediate polygonal enlargement 12, the inner surface of which bears against said pipe, and the outer suf'ace of which is contoured l to bear snugly against the inside of the jacket J, The discharge end 13 of each nozzle projects into an `opening t in thek jacket, said opening being large enough to provide clearance around the nozzle end to permit of relative longitudinal movement of jacket and blower pipe, due to expansion and contraction, without shearing off the nozzles. The enlargement 19. closes the opening. t on the inside,

The blower pipe B is not subjected to the same degree of heat as the jacket because of the cooling effect of the air circulating through said jacket, and also the protection afforded by the jacket. However, in certain loca- 'OllS Qf some boilers the heat is so intense that even ther jacket does not protect the blower pipe sufficiently against the heat, with the result that the blower pipe WarPs and. forces the sections of the jacket out 0f line,- I intend to overcome this dfultyby making' the blower pipe in sections as well as the jacket- The blower pipe Sections should be connected so that all joints are stean'i-tight to prevent loss of s t-eai'n` into the jacket. 1 have various methods 0f accomplishing this object, although the preferred form is shown in Figures vl to 4l inclusive.

In this form the blowerpipe B is composed of a series of pipe Ysections 11i, 14:, etc.,

lthe adjacent` ends of the sections being received 'in the cylindrical ends of' a Comparatively short annularly corrugated member 15. composed of some flexible metal (such as copper). .The ends of ,the pipe sections are welded to the member 15 entirely around theircircumference as "shown -at- 1,6, 1G. lVhatever tendency toward warping is im partedo the blower pipe by thelieatA to which 1t is subjected, will now be reSlGtcl` to each individual section, and as the members 15 will yield with a movement of the sections 14 in any direction, this warping cannot be cumulative. Consequently there will be no -distortion of the blower pipe considered as a unit since its longitudinal axis from end to end will remain undisturbed.

When my improved blowerl pipe is combined with the sectional jacket there results a blower unit that is practically unaffected by thehghest boilertemperatures and will remain serviceable for a long period without attention. Of course, in those parts of the boiler where the cooling jacket is not required, the sectional blower pipe is used alone just as integral blower pipes are now used with, however, greater advantages than the old one-,piece blower pipe.

Referring'`v now,` to the modifications, I show in Fig. 6, blower pipe sections 17, 17 having one end 17 flanged to receive the plain end of the adjacent section, the overlapping ends being connected by pins 18 This construction permits of a certain flexibility at the joints although not expansible as is the main form.

In Fig; 7 the sections 19 are connected by internal sleeves 20.

Fig. 8 shows a sort of stuffinglbox connection, the sections Q1 being connected by a member 2Q with annular recesses r Yfor receiving the ends of' adjacent sections, a suitable packing p being stuffed in the base of the recesses.

Fig. 9 shows flanged sections 23 connected by bolts to flanged members 24 made suitable flexible material. l

In Fig. 10 the respective sections 25 are held together by a rod 26, a suitable hollow of' a member 27 being inserted between adjacent 7 sections, said member havinginclined walls for the end of the sections to engage. Fig.,11 shows sections 28'welded`to globular members 29 made of some flexible material.

Fig. 12 shows a piece of flexible tubing 30 adapted to the blower unit. Obviously other forms may be devised, but any flexible blower pipe forming a part of a. soot blower unit is contemplated by my the blower pipe,said cooling jacket also b eingcomposed of a 'plurality' ofv relatively movable sections,

2.V In a .soot blower for boilers, a steam supply pipe, a blower unit comprising a flexible blower pipe and a jacket surrounding said blower pipe and spaced therefrom, and a valve for controlling the steam supply to said blower pipe.

In a soot blower for boilers, a steam suppl)7 pipe, a blower unit comprising a blower pipe and a jacket surrounding said blower pipe and spaced therefrom, a Valve for controlling the steam supply to said 10 blower pipe, said blower pipe comprising a series of sections and flexible members connecting said sections, said jacket comprising a series of sections and sleeves connecting the jacket sections, the aforesaid :flexible members being disposed between successive sleeves throughout the blower unit.

In testimony whereof I hereunto allix my signature;

LEO JOHN BAYER. 

